1//===-- hwasan_flags.inc ----------------------------------------*- C++ -*-===// 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8// 9// Hwasan runtime flags. 10// 11//===----------------------------------------------------------------------===// 12#ifndef HWASAN_FLAG 13# error "Define HWASAN_FLAG prior to including this file!" 14#endif 15 16// HWASAN_FLAG(Type, Name, DefaultValue, Description) 17// See COMMON_FLAG in sanitizer_flags.inc for more details. 18 19HWASAN_FLAG(bool, verbose_threads, false, 20 "inform on thread creation/destruction") 21HWASAN_FLAG(bool, tag_in_malloc, true, "") 22HWASAN_FLAG(bool, tag_in_free, true, "") 23HWASAN_FLAG(bool, print_stats, false, "") 24HWASAN_FLAG(bool, halt_on_error, true, "") 25HWASAN_FLAG(bool, atexit, false, "") 26HWASAN_FLAG( 27 bool, print_live_threads_info, true, 28 "If set, prints the remaining threads in report as an extra information.") 29 30// Test only flag to disable malloc/realloc/free memory tagging on startup. 31// Tagging can be reenabled with __hwasan_enable_allocator_tagging(). 32HWASAN_FLAG(bool, disable_allocator_tagging, false, "") 33 34// If false, use simple increment of a thread local counter to generate new 35// tags. 36HWASAN_FLAG(bool, random_tags, true, "") 37 38HWASAN_FLAG( 39 int, max_malloc_fill_size, 0, 40 "HWASan allocator flag. max_malloc_fill_size is the maximal amount of " 41 "bytes that will be filled with malloc_fill_byte on malloc.") 42 43HWASAN_FLAG(bool, free_checks_tail_magic, 1, 44 "If set, free() will check the magic values " 45 "after the allocated object " 46 "if the allocation size is not a divident of the granule size") 47HWASAN_FLAG( 48 int, max_free_fill_size, 0, 49 "HWASan allocator flag. max_free_fill_size is the maximal amount of " 50 "bytes that will be filled with free_fill_byte during free.") 51HWASAN_FLAG(int, malloc_fill_byte, 0xbe, 52 "Value used to fill the newly allocated memory.") 53HWASAN_FLAG(int, free_fill_byte, 0x55, 54 "Value used to fill deallocated memory.") 55HWASAN_FLAG(int, heap_history_size, 1023, 56 "The number of heap (de)allocations remembered per thread. " 57 "Affects the quality of heap-related reports, but not the ability " 58 "to find bugs.") 59HWASAN_FLAG(bool, export_memory_stats, true, 60 "Export up-to-date memory stats through /proc") 61HWASAN_FLAG(int, stack_history_size, 1024, 62 "The number of stack frames remembered per thread. " 63 "Affects the quality of stack-related reports, but not the ability " 64 "to find bugs.") 65 66// Malloc / free bisection. Only tag malloc and free calls when a hash of 67// allocation size and stack trace is between malloc_bisect_left and 68// malloc_bisect_right (both inclusive). [0, 0] range is special and disables 69// bisection (i.e. everything is tagged). Once the range is narrowed down 70// enough, use malloc_bisect_dump to see interesting allocations. 71HWASAN_FLAG(uptr, malloc_bisect_left, 0, 72 "Left bound of malloc bisection, inclusive.") 73HWASAN_FLAG(uptr, malloc_bisect_right, 0, 74 "Right bound of malloc bisection, inclusive.") 75HWASAN_FLAG(bool, malloc_bisect_dump, false, 76 "Print all allocations within [malloc_bisect_left, " 77 "malloc_bisect_right] range ") 78 79 80// Exit if we fail to enable the AArch64 kernel ABI relaxation which allows 81// tagged pointers in syscalls. This is the default, but being able to disable 82// that behaviour is useful for running the testsuite on more platforms (the 83// testsuite can run since we manually ensure any pointer arguments to syscalls 84// are untagged before the call. 85HWASAN_FLAG(bool, fail_without_syscall_abi, true, 86 "Exit if fail to request relaxed syscall ABI.") 87